Global Patent Index - EP 0722011 B1

EP 0722011 B1 2000-02-09 - Method of making tissue, newsprint, paper or paperboard

Title (en)

Method of making tissue, newsprint, paper or paperboard

Title (de)

Verfahren zur Herstellung von Tissuepapier, Zeitungsdruckpapier, Papier oder Karton

Title (fr)

Procédé de fabrication de papier tissu, papier journal, papier ou carton

Publication

EP 0722011 B1 (EN)

Application

EP 95309388 A

Priority

  • US 37092495 A
  • US 37094195 A

Abstract (en)

[origin: EP0722011A1] An improved paper furnish composition comprising an aqueous cellulosic furnish, a high molecular weight anionic polymer, and a modified lignin wherein the ratio of the anionic polymer to the modified lignin is from about 10:1 to 1:10 on an active basis is disclosed. A process employing this composition for making tissue, newsprint, paper or paperboard having improved drainage, retention, or formation and combinations thereof which enhance the pressing and drying operations of a paper machine is also provided. Preferably, the anionic polymer is added to the furnish prior to a shear stage, and the modified lignin is added subsequently.

IPC 1-7 (main, further and additional classification)

D21H 23/76

IPC 8 full level (invention and additional information)

C08L 97/02 (2006.01); C08L 97/00 (2006.01); D21H 17/23 (2006.01); D21H 17/37 (2006.01); D21H 17/42 (2006.01); D21H 23/14 (2006.01)

CPC (invention and additional information)

D21H 17/37 (2013.01); D21H 17/23 (2013.01); D21H 17/42 (2013.01); D21H 23/14 (2013.01)

Designated contracting state (EPC)

BE DE DK ES FR GB IT NL SE

EPO simple patent family

EP 0722011 A1 19960717; EP 0722011 B1 20000209; AU 4091896 A 19960718; AU 691375 B2 19980514; CA 2166838 A1 19960711; DE 69515016 D1 20000316; DE 69515016 T2 20000914; DK 0722011 T3 20000724; ES 2145226 T3 20000701; JP H08246387 A 19960924; NZ 280717 A 19960528

INPADOC legal status


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2000-07-24 [REG DK T3] TRANSLATION OF EP PATENT

2000-07-01 [REG ES FG2A] DEFINITIVE PROTECTION

- Document: ES 2145226 T3

2000-06-09 [ET] FR: TRANSLATION FILED

2000-04-21 [ITF] IT: TRANSLATION FOR A EP PATENT FILED

- Owner name: BUZZI, NOTARO&ANTONIELLI D'OULX

2000-03-16 [REF] CORRESPONDS TO:

- Document: DE 69515016 20000316

2000-02-09 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

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1998-09-16 [17Q] FIRST EXAMINATION REPORT

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